MT4 Chart Update

1
So I have created a IQfeed (VB.Net) to the .hst files and I can update that file realtime but the chart is not changing. Currently I am just using daily data and updating the current dates data via the .hst file. If I close the chart in mt4 and reopen it, it has the new data but will not update any future data received. I have tried the postmessage but it doesn't seem to work. So I have a couple of questions:
1. do I need to write the update quote to a tick file or any other file?
2. Am I posting the right command in postmessage - see below and hwnd has the right pointer.
If (hwnd! = 0) Then If (PostMessage(hwnd, WM_COMMAND, &H822C, 0) = 0) Then hwnd = 0
If (hwnd! = 0 And MT4InternalMsg! = 0) Then PostMessage(hwnd, MT4InternalMsg, 2, 1)

Thanks for any help


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